But when she bumped into her three months later she received the shock of her life.

'I’d last seen her when we were chatting in the school playground, so imagine my shock when I saw her with long blonde hair,' she wrote.

'Not only had she dyed her hair, but she also had hair extensions.

'I can only imagine that, as she knows he likes women with long blonde hair, (his ex-girlfriend also had long blonde hair) that she was trying to fit in with what she perceived as being his "ideal woman".

The new flame did not stop there and began to adopt similar hobbies and the same fashion sense as the woman.

'I am a keen horse rider, which was something my ex and I enjoyed together. I’ve heard from my daughters that she has enrolled herself in horse riding lessons,' she explained.

The new love interest has also taken up surfing, swing dancing and bush walking, hobbies the woman and her children use to do as a family.

'There's nothing wrong with that at all, she's clearly just trying to fit in with his way of life and wants to be able to participate in the things he loves to do,' she said.

But what freaks the woman out the most is the change in physical appearances.

She loves to wear retro sundresses but now the new woman, who is more of a jeans and t-shirt person, is following suit.

But she maintain that she holds no animosity towards the new woman.

'Hopefully, he is good to her and, although it’s still early days, loves her no matter how she looks,' she said.